MetOp HRPT with RTL-SDR, and what sample rate does || Satellite reception pt.8

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In this video I talk about how and why it is possible to receive MetOp HRPT broadcasts using an ordinary RTL-SDR receiver, and how required sample rate selection works when it comes to digital signals.
Links:
My website and other social media - sgcderek.github.io/
Timestamps:
00:00 - Intro
01:38 - MetOp introduction
02:41 - SDR terms
04:33 - RTL-SDR / Nooelec NESDR
04:48 - Sample rate vs bandwidth
07:08 - Symbol rate
09:23 - Nyquist-Shannon theorem
12:35 - Samples per symbol
13:45 - PSK constellation diagrams
15:50 - Error correction

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Опубликовано:

22 май 2024

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Комментарии : 18

@waltzofthestars2078 11 месяцев назад

The noise you describe when the signal is fading, is, fortunately, mostly salt and pepper noise. It can be easily and reliably reduced (a lot!) with a 3x3 median filter(e.g., medfilt2() in each RGB channel in matlab). The results are quite amazing, considering this is post processing. Great video and work.

@Snoknogunen Год назад

I am just now getting into satellite reception, and your content has been invaluable so far. Thank you!

@CBarker151 Год назад

Really interesting video, and really helped me start to understand this topic, thanks for taking the time and going through the effort of putting this together.

@MrRObot-bin Год назад

Ok now seriously i really love your content thank you

@ra1nmaker001 6 месяцев назад

Hi Derek, great series of videos! Are there any satellites transmitting LRPT currently?

@dereksgc 6 месяцев назад

Meteor-M N2-3 does currently, see one of my latest videos about it, make sure to look up recent information as its frequency can change sometimes

@ra1nmaker001 6 месяцев назад

@@dereksgc great, thank you! I was inspired by you to dust my RTL SDR and get some images from weather satellites 💪🏻

@Inigowi 3 месяца назад

Hello, do you know if Metop is still transmitting HRPT?

@maosolny5856 Год назад

Does sample rate or bandwidth effect analog signal (like noaa apt)? In my expirience no. But meaby I was doing sometning wrong all time.

@dereksgc Год назад

It works more or less the same way. APT is 2 lines per second, 2048 pixels per line, 8 bits per pixel, so the equivalent digital rate would be around 33kbps. With doppler shift and the extra FM bandwidth you want a rate that's also around double that so anything above 60ksps should work